From typicallyspanish.com

Madrid
Four police found not guilty in Boric Acid case
By h.b.
Jul 9, 2008 - 7:17 AM

The Provincial Court in Madrid has found the four policemen accused of manipulating a report on the March 11th 2004 train bombings which made a reference to Basque terrorist group ETA, not guilty.

The court said that an administrative irregularity had taken place when the men used the presence of Boric Acid to suggest a link to ETA, but that no crime had been committed.